import com.sun.org.apache.xpath.internal.operations.Bool;

public class Sc {

    static  String scno = null;
    static  String sno = null;
    static  String cno = null;
    static  String mark = null;


    Sc(String scno,String sno,String cno,String mark){
        this.sno = sno;
        this.scno=scno;
        this.cno=cno;
        this.mark = mark;
    }


    public static void putNull(){
        sno = null;
        cno= null;
        scno = null;
        mark = null;

    }

    public static Boolean isNull(){
        if (sno!=null){
            return false;
        }else{
            return true;
        }
    }
}
